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## Homework Statement

It is found (through and error) that you will "feel" weightless when you travela round at 42 mph over a smoothy rounded hill. What is the radius of the hill?

## Homework Equations

I'm not sure what equation to use with this problem

## The Attempt at a Solution

the only thing I know is the answer, which is 35.6 m.

Could someone help walk through this problem? It would be much appreciated.